Nima Haghpanah Shahrouz Moaven Jafar Habibi Mehdi Kargar Soheil Hassas Yeganeh Approximation Algorithms for Software Component Selection Problem. 159-166 2007 conf/apsec/2007 APSEC http://doi.ieeecomputersociety.org/10.1109/APSEC.2007.26 db/conf/apsec/apsec2007.html#HaghpanahMHKY07